Popup Maker - Videos 1.1.4

* Fix: Javascript error when mediaelementjs is not defined.

* Improvement: Auto mute if the browser doesn't support autoplay when unmuted.
* Improvement: Added clickable notice above video to unmute when the video was automuted.
* Improvement: Added clickable notice above video to go full screen when the video couldn't go fullscreen automatically due to browser settings.
* Improvement: Added mediaelements hotfix until WP core includes the needed updates to fix Vimeo videos.
* Fix: Vimeo autoplay issues.
* Fix: Removed conditional that was breaking video styles.

• Improvement: Replaced usage of Plyr.js library with the MediaElement.js library included with WP core.
• Improvement: Faked full screen mode when browsers block true fullscreen.
• Updated for full Popup Maker v1.7 support.
  • Leveraged the new AssetCache reducing the need to load an extra JS file for this extension.
  • Autoloader
  • Upgrade routines.